SE9900650D0 - Method of and apparatus for filtering intermodulation products in a radiocommunication system - Google Patents

Method of and apparatus for filtering intermodulation products in a radiocommunication system

Info

Publication number
SE9900650D0
SE9900650D0 SE9900650A SE9900650A SE9900650D0 SE 9900650 D0 SE9900650 D0 SE 9900650D0 SE 9900650 A SE9900650 A SE 9900650A SE 9900650 A SE9900650 A SE 9900650A SE 9900650 D0 SE9900650 D0 SE 9900650D0
Authority
SE
Sweden
Prior art keywords
signal
phase
intermodulation products
radiocommunication system
frequency components
Prior art date
Application number
SE9900650A
Other languages
English (en)
Other versions
SE521066C2 (sv
SE9900650L (sv
Inventor
Philippe Charas
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/697,279 external-priority patent/US5862459A/en
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE9900650A priority Critical patent/SE521066C2/sv
Publication of SE9900650D0 publication Critical patent/SE9900650D0/sv
Publication of SE9900650L publication Critical patent/SE9900650L/sv
Publication of SE521066C2 publication Critical patent/SE521066C2/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
    • H03F1/3235—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction using a pilot signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
SE9900650A 1996-08-27 1999-02-24 Förfarande och apparat för filtrering av intermodulationsprodukter i ett radiokommunikationssystem SE521066C2 (sv)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9900650A SE521066C2 (sv) 1996-08-27 1999-02-24 Förfarande och apparat för filtrering av intermodulationsprodukter i ett radiokommunikationssystem

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/697,279 US5862459A (en) 1996-08-27 1996-08-27 Method of and apparatus for filtering intermodulation products in a radiocommunication system
PCT/SE1997/001410 WO1998009372A1 (en) 1996-08-27 1997-08-26 Method of and apparatus for filtering intermodulation products in a radiocommunication system
SE9900650A SE521066C2 (sv) 1996-08-27 1999-02-24 Förfarande och apparat för filtrering av intermodulationsprodukter i ett radiokommunikationssystem

Publications (3)

Publication Number Publication Date
SE9900650D0 true SE9900650D0 (sv) 1999-02-24
SE9900650L SE9900650L (sv) 1999-04-27
SE521066C2 SE521066C2 (sv) 2003-09-30

Family

ID=26663513

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9900650A SE521066C2 (sv) 1996-08-27 1999-02-24 Förfarande och apparat för filtrering av intermodulationsprodukter i ett radiokommunikationssystem

Country Status (1)

Country Link
SE (1) SE521066C2 (sv)

Also Published As

Publication number Publication date
SE521066C2 (sv) 2003-09-30
SE9900650L (sv) 1999-04-27

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Legal Events

Date Code Title Description
NUG Patent has lapsed